The formation of chondrules at high gas pressures in the solar nebula

被引：146

作者：

Galy, A ^{[1
]}

Young, ED ^{[1
]}

Ash, RD ^{[1
]}

O'Nions, RK ^{[1
]}

机构：

[1] Univ Oxford, Dept Earth Sci, Oxford OX1 3PR, England

来源：

SCIENCE | 2000年 / 290卷 / 5497期

关键词：

D O I：

10.1126/science.290.5497.1751

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

High-precision magnesium isotope measurements of whole chondrules from the Allende carbonaceous chondrite meteorite show that some aluminum-rich Allende chondrules formed at or near the time of formation of calcium-aluminum-rich intrusions and that some others formed later and incorporated precursors previously enriched in magnesium-26. Chondrule magnesium-25/ magnesium-24 correlates with [magnesium]/[aluminum] and size, the aluminum-rich, smaller chondrules being the most enriched in the heavy isotopes of magnesium. These relations imply that high gas pressures prevailed during chondrule formation in the solar nebula.

引用

页码：1751 / 1753

页数：3

共 26 条

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